American Association of State Highway Officials. (1955). Policy on maintenance of safety and traffic control devices and related traffic services. Amer. Assoc. of State Highway Officials.
Chicago Style (17th ed.) CitationAmerican Association of State Highway Officials. Policy on Maintenance of Safety and Traffic Control Devices and Related Traffic Services. Washington, D.C.: Amer. Assoc. of State Highway Officials, 1955.
MLA (8th ed.) CitationAmerican Association of State Highway Officials. Policy on Maintenance of Safety and Traffic Control Devices and Related Traffic Services. Amer. Assoc. of State Highway Officials, 1955.
Warning: These citations may not always be 100% accurate.